I thought it was confirmed that the motorcycles they were building were for GotG rather than CA2.

There was a message sent out to motorcycle manufacturers to produce a futuristic bike for "a Marvel movie" set in 2035 to be filmed in England. People started jumping to conclusions that it meant GOTG, which would run contrary to the previous official reports of 31st century GOTG.

I said it then and I'll say it again: the 2035 movie is highly, highly likely to refer to Days of Future Past, *not* GOTG.